Nissei Finger Tip Pulse Oximeter B0-600. Displays % SpO2 and Pulse Rate
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SpO2 stands for peripheral capillary oxygen saturation, an estimate of the amount of oxygen in the blood. More specifically, it is the percentage of oxygenated haemoglobin (haemoglobin containing oxygen) compared to the total amount of haemoglobin in the blood (oxygenated and non-oxygenated haemoglobin).
SpO2 is an estimate of arterial oxygen saturation, or SaO2, which refers to the amount of oxygenated haemoglobin in the blood.
Haemoglobin is a protein that carries oxygen in the blood. It is found inside red blood cells and gives them their red colour.
SpO2 can be measured by pulse oximetry, an indirect, non-invasive method (meaning it does not involve the introduction of instruments into the body). It works by emitting and then absorbing a light wave passing through blood vessels (or capillaries) in the fingertip. A variation of the light wave passing through the finger will give the value of the SpO2 measurement because the degree of oxygen saturation causes variations in the blood’s colour.
This value is represented by a percentage and in healthy people, normal SpO2, or blood oxygen saturation levels, should range from 94 to 99 percent. For a person with a mild respiratory disease, the value should be at least 90 percent.